Other Income - Net (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Other Nonoperating Income By Component [Line Items]
Interest income					$ 19,017	$ 8,570	$ 5,988
Income from Ancillary Businesses					53,568	25,692	18,934
Management fee income from home building unconsolidated entities, net	$ 2,455,238	$ 1,913,353	$ 1,599,199	$ 1,175,468	7,223,966	7,143,258	5,815,058
Retained customer deposits					0	8,937	5,801
Land sales, net					0	6,331	8,621
Other					(1,031)	1,190	(1,184)
Total other income - net					81,502	62,460	51,062
Revenues and expenses of non-core ancillary businesses
Revenue					150,114	158,051	134,116
Expense					132,823	132,359	115,182
Gain (Loss) on Disposition of Business					36,277
Management Fee [Member]
Other Nonoperating Income By Component [Line Items]
Management fee income from home building unconsolidated entities, net					$ 9,948	11,740	12,902
Land sales prior [Member]
Other Nonoperating Income By Component [Line Items]
Management fee income from home building unconsolidated entities, net						$ 134,327	$ 284,928